{
  "manageEntity": {
    "action": "Save",
    "entityId": "986450",
    "entityType": "Track",
    "nonce": "0xfd9683d25376f13c28d49a65f0c5d906ac8cbe7f72943645806a7ef205d4c5f4",
    "signature": "0x2c90a683feadaf55dd714da1b13a63a3b0790dfb916b0e5ee04458618d903312166f8114f632eb758c7ce4a9e83f0a026275ff883a1945046bed6f643e3dbfa41b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}